Method of filling a crack in concrete

Abstract

The pressure to the cracks in the concrete building and the like exerted by a binding material supplied thereinto is buffered by the expansion of a pressure buffering portion located somewhere between the supply pump and the supply pipe and after the supply pump is disconnected, the binding material supplying operation is succeeded by the pressure buffering portion which, having therein reserved the binding material by expansion, forces the binding material out into the cracks by contraction.

We claim: 
     
       1. A method of filling a crack in concrete by supplying a binder under pressure from a binder supply source into the crack, comprising the steps of providing a pressure buffering portion intermediate the binder supply source and the crack for passing the binder from the binder supply source to the crack, the buffering portion having an elastic tube, an end pipe connected to one end of the elastic tube and a flat washer at an end of the end pipe, engaging the washer over and around the crack with the end pipe end over the crack, providing a supply pipe between the supply source and an opposite end portion of the elastic tube with means for connecting the elastic tube and the supply pipe, and providing check valve means for preventing the binder supplied from flowing backwards out of the elastic tube, buffering the binder supply pressure exerted on the crack by increasing the capacity of the elastic tube, storing a reserve of the binder in the elastic tube, and supplying the crack with the binder by the continuous reduction and capacity of the elastic tube so that the crack does not increase in size. 
     
     
       2. A method of filling a crack in concrete by supplying a binder under pressure from a binder supply source into the crack, comprising the steps of providing a pressure buffering portion intermediate the binder supply source and the crack for passing the binder from the binder supply source to the crack, the buffering portion having an elastic tube, an end pipe connected to one end of the elastic tube, engaging the end pipe over the crack with the end pipe end over the crack, providing a supply pipe between the supply source and an opposite end portion of the elastic tube with means for connecting the elastic tube and the supply pipe, and providing check valve means for preventing the binder supplied from flowing backwards out of the elastic tube, buffering the binder supply pressure exerted on the crack by increasing the capacity of the elastic tube, storing a reserve of the binder in the elastic tube, and supplying the crack with the binder by the continuous reduction and capacity of the elastic tube so that the crack does not increase in size.